According to the admission policy of ESIC:

‘Ward of Insured Person’ will be a legitimate natural born child who is wholly dependent on the earnings of the insured person and who is -

(i) receiving education, till he or she attains the age of twenty- one years,

(ii) or an unmarried legitimate natural born daughter.

(iii) ‘Ward of IP’ who is in receipt of ‘Dependents’ Benefit’ under the Act.

(iv) Natural born ‘Ward of IP’ in r/o Insured Persons who are receiving Permanent Disability Benefit under the Act for 40% or more disability”.

Note: Candidates under 9 (iii) and 9 (iv) above would be considered under Group-I.

Reference: https://www.esic.nic.in/admissionportal/admission_policy.pdf