Answer: D Eulogise means praise, where as lambast indicates criticism. Invigorate means to energise and debilitate means to weaken ... Both are antonyms of each other.
Answer: C Penurious - Poor and Affluence - wealth Both are antonyms of each other. Taciturn (uncommunicative) and verbosity (prolixity) are also antonyms.
Answer: D Cryptic and enigma are also synonyms. In both the first is an adjective and the second is a noun. The word euphoric and ecstasy are synonyms.