Select the correct active form.
"He is known to me."

Correct option is B

The correct active/passive voice of the given sentence is (b) I know him.
Explanation:
· Passive: He is known to me. Pattern: Object (He) + be (is) + V3 (known) + to + Subject (me).
· Active structure requires: Subject + V1 + Object → I know him.
· Option (b) corresponds to the active core I know him.
· Options (a) and (c) shift the tense (past simple/past perfect), which is incorrect; original is in present simple. Option (d) I know about him changes the meaning (knowing “about” ≠ knowing him personally).
· Rules of conversion (Passive → Active):
· Identify agent/experiencer: to me → I.
· Move the passive subject He to object position him.
· Use present simple know to match passive is known.
· Structure:
· Active: Subject + V1 + Object → I know him.
· Passive: Object + am/is/are + V3 (+ by/ to + Agent) → He is known to me.
· Example:
· Active: I respect her. → Passive: She is respected by me.
· Info booster:
· Stative verbs of cognition/perception (know, believe, think) commonly form passives without by; idiomatic preposition to appears with known → known to me/us/them.