Thank you for putting your query.
Your father is having moderate anemia
most probably of iron deficiency
type.your father need some additional blood tests to be done to know what type of anemia is this and what is the cause.Give him iron rich diet like chicken,sea fish,eggs,green leafy vegetables,soyabean, jaggery etc.consult your doctor.there are various iron preparations are available.
so get these medicines that will be prescribed by your doctor.
take care of your father.