Which one of the following statements is true in relation to 'family' under the Employees' State Insurance Act, 1948 -

(A) An unmarried daughter who is wholly dependent on the earnings of the insured person is deemed to be in family up to the age of twenty one years

(B) A child who is infirm by reason of any physical or mental abnormality and wholly dependent on the earnings of the insured person, is deemed to be in family up to the age of eighteen years

(C) Dependent parents whose income from all sources does not exceed such income as may be prescribed by the Central Government are deemed to be in family

(D) All of the above.