Given below are the four sentences. Identify the correct sentence and choose…

Concept: To show that someone's past state or preference has changed into a different, evolving present state, English typically uses (a) a past-tense subordinate clause ("As/While he was...") or a bare "Once + noun phrase" reduced clause for the PAST state, together with (b) a present or present-continuous main clause for the changing, current state. The present participle "being" describes an action that is still ongoing, so pairing "being" with "once" (a marker of a finished past state) is an awkward, non-idiomatic combination that this kind of construction normally avoids.

Application: Checking each version against this pattern, "Once an avid soccer fan, he is now becoming more interested in cricket" pairs the plain, past-only reduced phrase "Once an avid soccer fan" with a correctly formed present-continuous main clause ("he is now becoming more interested in cricket"). There is no ambiguous connector, no awkward participle, and no redundant wording, so this version reads as the most direct and precise of the four.

Cross-check against the other versions:

• "As he was once an avid soccer fan, he is now increasingly becoming interested in cricket" uses "As", which reads as giving a reason for the new interest rather than simply contrasting it with the old one; treating a finished past hobby as the cause of a new one is logically imprecise.

• "Being once an avid soccer fan, he is now increasingly becoming a cricket fan" opens with "Being", which reads as an ongoing/present state; pairing it with "once" (a finished past state) is an awkward, non-idiomatic combination.

• "Now he is becoming interested in cricket but was an avid soccer fan before" states the present change first and only then circles back to the past hobby with "but ... before" - a more roundabout way to express the same shift than a direct past-then-present construction.

Result: among the four, the version reading "Once an avid soccer fan, he is now becoming more interested in cricket" is the clearest and most direct, so it is the correct sentence.