Which of the following statements about consent is 'not true':

• A. Consent can only be valid if it is given by a person who is sane and has attained maturity,ie.age of 18 yrs
• B. For sterilization of a married person,consent of both spouse,i.e. husband and wife is required
• C. For artificial insemination,consent of the patient alone is required
• D. In emergency situation,if no near relative is available,doctors can perform procedure/surgery necessary to save life even without consent,provided that the procedure intended is certified to be essential to save life of the patient,by two doctors