Dear student,
Insurance is based on some principles, principle of Utmost Good Faith is one of them. According to this the insured and the insurer must disclose all the material facts to each other related to insurance policy. And if the insured hides any material fact from the insurance company then the insurance company can refuse to make compensation. And here Karim has hidden the fact that he is a cancer patient so LIC company has done right act by not providing compensation.
Regards