Answer: d. discourage
Explanation: Stimulate means to encourage, inspire, motivate, etc.
The meaning of other words are:
1. yield - earnings, profit, harvest, etc.
2. grab - capture, snatch, etc.
3. benign - benevolent, gentle, kind, merciful, etc.
Answer: a. supple
Explanation: Supple means graceful, flexible, ductile, elastic, etc.
Stiff means rigid, solid, thick, etc.
E.g. He always wears a shirt with stiff collar.
Answer: b. ignorant
Explanation: Ignorant means lack of knowledge or information.
The word Keen means to have eagerness/enthusiasm, it also means sharp or penetrating. Hence, edge and sharp are synonyms.
E.g. He had keen interest in music.
Answer: a. puny
Explanation: The antonym of the word 'Titanic' is puny.
The option (b) heavy and (c) gigantic are synonyms of the word 'Titanic'. The word 'Gigantic' also means huge, giant, enormous, etc.
E.g. The titanic ship sank in North Atlantic ocean.
Answer: d. defeat
Sentence: You need to do 5 goals more to attain victory
Meaning: Victory refers to an act of winning an event or competition or a game.
Answer: c. Tender
Sentence: It was a tough job to solve Maths paper
Meaning: Strong which can bear adverse conditions.