The correct sentence is ‘He refrained from taking any drastic action’ because the verb ‘refrain’ is followed by the preposition ‘from’.

১. When using ‘from’ after ‘refrain’, the subsequent verb must be in its gerund form (verb+ing).
২. Other prepositions like ‘on’, ‘in’, or ‘to’ are grammatically incorrect in this context.
৩. Refrain from means to stop oneself from doing something intentionally.

অতিরিক্ত তথ্য: Similar verbs like abstain, prevent, and prohibit also take the preposition ‘from’.