Doubt regarding filing on ITR 4

He can go for ITR 4 but you should keep in mind

person having income from salary, house property or other sources above Rs 50 lakh cannot use this form.

person who is either a director in a company and has invested in unlisted equity shares cannot use this form.

person's HUF or partnership firm whose books of accounts should be audited under the Income Tax Act, 1961.