Choose the most appropriate pair of words to fill in the blanks in th…

The correct answer is Option (1) → into, from

The phrase "come into effect":

• Come into effect means to begin to apply, for a law, rule or policy. The preposition is always into (like "come into force").
• From marks the starting point in time: the policy applies from January 1 onwards.
• Complete sentence: The new policy will come into effect from January 1, 2030.
  Example: The new traffic rules came into effect last month.

Why the Other Options are Incorrect?

Option 2: be, from — Incorrect. "Come be effect" is not English: "be" is a verb and cannot join "come" to "effect".

Option 3: in, for — Incorrect.

• The fixed phrase is "come into effect", not "come in effect".
• "For January 1" does not show the date from which the policy starts.

Option 4: from, to — Incorrect.

• "Come from effect" has no meaning.
• "To January 1" marks an end point, not a starting date.