**Rule: Use of 'a' before consonant sounds and 'the' for superlatives.** The word 'university' begins with a 'y' sound (a consonant sound), so the indefinite article 'a' is used before it. The phrase 'most prestigious' is a superlative adjective, which requires the definite article 'the' before it to specify a particular one from a group. Option (b) is incorrect because 'an' is used before vowel sounds, not the 'y' sound in 'university'. Option (c) is incorrect because 'the university' would imply a specific, previously mentioned university, which is not the case here, and 'a most prestigious' is grammatically wrong. Option (d) incorrectly uses 'a' before the superlative.

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Nimble (پھرتیلا) means quick and light in movement or action; agile. Clumsy (بھونڈا) means awkward in movement or handling things. Giant (دیو ہیکل) means an imaginary or mythical being of human form but superhuman size. Quick (تیز) means moving fast or doing something fast. Frank (صریح) means open, honest, and direct in speech or writing, especially when dealing with unpalatable matters.

Dainty (نازک) means delicately small and pretty. Vigorous (طاقتور) means strong, healthy, and full of energy. Splendid (شاندار) means very impressive. Aggressive (جارحانہ) means ready or likely to attack or confront; characterized by or resulting from aggression. Towering (بلند) means extremely tall.

Choice (انتخاب) means an act of selecting or making a decision when faced with two or more possibilities. Refusal (انکار) means the act of saying no or refusing to do something. Dilemma (دبیدھا) means a situation in which a difficult choice has to be made between two or more alternatives. Harm (نقصان) means physical injury or damage. Approval (منظوری) means the belief that someone is doing something right.

Passionate (جذباتی) means showing or caused by strong feelings or a strong belief. Calm (پرسکون) means not showing or feeling nervousness, anger, or other emotions. Fervent (گرم جوش) means having or displaying a passionate intensity. Arrogant (مغرور) means having or revealing an exaggerated sense of one's own importance or abilities. Sure (یقینی) means confident or certain of something.

Fickle (غیر مستقل) means changing frequently, especially as regards one's loyalties or affections. Constant (مسلسل) means occurring continuously over a period of time. Quick (تیز) means moving fast or doing something fast. Fast (تیز) means moving or capable of moving at high speed. Diseased (بیمار) means affected with disease.

Mask (چھپانا) means conceal (something) from view. Expose (بے نقاب کرنا) means make (something) visible by uncovering it. Deface (خراب کرنا) means spoil the surface or appearance of (something), e.g., by drawing or writing on it. Injure (زخمی کرنا) means do physical harm or damage to (someone). Hit (مارنا) means strike (someone or something) forcefully.

Debilitating (کمزور کرنے والا) means making someone very weak and infirm. Strengthening (مضبوط بنانے والا) means make or become stronger. Enfeebling (کمزور کرنے والا) means make weak or feeble. Inhabiting (آباد کرنا) means live in; occupy as a place of residence. Occupying (قابض ہونا) means reside or have one's place of business in (a building).

Slur (بدنامی) means an insinuation or allegation about someone that is likely to insult them or damage their reputation. Credit (اعتبار) means public acknowledgment or praise, typically that given or received when a person's responsibility for an action or idea is apparent or recognized. Promise (وعدہ) means a declaration assuring that one will do something or that a particular thing will happen. Hope (امید) means a feeling of expectation and desire for a particular thing to happen. Virtue (نیکی) means behavior showing high moral standards.