Which of the following genetic disorders is often associated with heart disease?

Treatment with 'Alloxan' destroys

Diabetes mellitus occurs only when:

$A$ disease characterised by raised levels of blood glucose as well as increased fat and protein metabolism is

Given below are two statements.
Statement $I$: Diabetes mellitus is seen in adults only.
Statement $II$: Diabetes mellitus is due to facilitated excessive movement of glucose into cells by insulin.
In light of the above statements,select the correct answer from the options given below.

Diabetes mellitus is caused by a deficiency of which of the following?