The correct answer is B. Mahesh, aged 50 years, working in a coal mine.
Non-medical underwriting is a type of insurance underwriting that does not require the applicant to undergo a medical exam. This type of underwriting is typically used for applicants who are considered to be low-risk, such as young, healthy people.
Mahesh, aged 50 years, working in a coal mine is not likely to qualify for non-medical underwriting because he is considered to be a high-risk applicant. Coal mining is a dangerous occupation, and Mahesh is at an increased risk of injury or death. Additionally, Mahesh is older than the typical applicant for non-medical underwriting.
The other three applicants are more likely to qualify for non-medical underwriting. Savita, aged 26 years, working in an IT company as a software engineer is a young, healthy person who is not involved in a dangerous occupation. Satish, aged 28 years, working in a bank and has applied for an insurance cover of Rs. 1 crore is also a young, healthy person who is not involved in a dangerous occupation. Pravin, aged 30 years, working in a departmental store and has applied for an endowment insurance plan for a tenure of 10 years is also a young, healthy person who is not involved in a dangerous occupation.