Explanation:

- Let's analyze the pattern in the series: 4, 8, 35, 51, 176, 211, 555.

- From 4 to 8, the increase is 4 (4+4=8).

- From 8 to 35, the increase is 27 (8+27=35).

- From 35 to 51, the increase is 16 (35+16=51).

- From 51 to 176, the increase is 125 (51+125=176).

- From 176 to 211, the increase is 35 (176+35=211).

- From 211 to 555, the increase is 344 (211+344=555).

- The sequence of increases doesn’t follow a consistent pattern.

- If we assume perfect cubes (1³, 3³, 4³, 5³, 6³) for increase:

- Between 4 to 8, it’s 4 (2²).

- Between 51 and 176, the increase should be 5³ (125).

- But between 176 and the next number should be 6³ (216), matching 176+216=392.

- ?? Option:2, 211 is inconsistent with this pattern.

- 211 should have been replaced by 392 following the cube pattern.

211 is the wrong number.