The question asks about the Wholesale Price Index (WPI) with regard to 3 statements. The correct answer is Option 2: "Statements 2 and 3 are correct".

Option 1 posits that "1, 2 and 3" are correct. However, this is not accurate because the first statement is incorrect. The new WPI series with base 1993-94 = 100 became effective from April 2000, not April 1998.

Option 2 states that the statements 2 and 3 are correct. This is indeed accurate. Statement 2 correctly indicates that the new WPI series became effective from 1 April 2000. Statement 3 accurately states that the weight for electricity has increased in the new WPI series.

Option 3 suggests that statements 1 and 3 are correct. However, the first statement is incorrect, as noted earlier about the effective date of the new WPI series.

Option 4 proposes that statements 1 and 2 are correct. This is wrong because the first statement about the effective date of the new WPI series is incorrect.