Which of the following criteria is NOT correct as per the definition of urban settlement given by the Census of India in 1991?

The correct option is: At Least 50 percent of male workers are engaged in non-agricultural pursuits.

According to the Census of India (1991 and subsequent censuses), an urban settlement is defined based on specific demographic and administrative criteria. Under these guidelines, a settlement is classified as urban if it meets either of the following conditions:

1. Administrative Criteria: All places with a municipality, corporation, cantonment board, or notified town area committee, etc. (often referred to as Statutory Towns).
2. Demographic Criteria (Census Towns): All other places satisfying the following three criteria simultaneously:
    a) A minimum population of 5,000;
    b) At least 75 percent of the male main working population engaged in non-agricultural pursuits; and
    c) A density of population of at least 400 persons per square kilometer (1,000 per square mile).

Therefore, the statement claiming that "at least 50 percent of male workers are engaged in non-agricultural pursuits" is incorrect because the actual threshold required by the Census of India is 75 percent, not 50 percent.