Toxic means poisonous ,Antagonistic means hostility towards someone and Purgative is laxative .

Correct Option: C

The word Prohylactic means: course of action used to prevent a disease. Hence, the words prophylactic and preventive are synonymous.

Irrational means unreasonable , Partisan means cause .

Correct Option: C

The word Flimsy (Ajective) means: badly made and not strong enough: thin and easily torn. Hence, the words flimsy and weak are synonymous.