Explanation:

• India holds ministerial-level ‘2+2’ Dialogue with the U.S.A and Japan.
• It holds such talks with Australia, at the foreign secretary and defence secretary level.

Avout ‘2+2’ Dialogue

• It is a format of dialogue where the defense and foreign ministers or secretaries meet with their counterparts from another country. 2+2 Ministerial is the highest-level institutional mechanism between the two countries.
• India holds such talks with Australia, at the foreign secretary and defense secretary level but with Japan and the US at the ministerial level.
• With the US this was the second 2+2 meeting (Washington), first was held in New Delhi in September 2018.
• US holds such ministerial dialogues with Australia and Japan also.

Hence option 4th is correct.