Which of the following is used as prophylaxis in case of diphtheria:

• In most countries, the diphtheria toxoid vaccine is given in combination with tetanus toxoid and pertussis vaccines (DTP vaccine). • DPT vaccine is most effectively used for prophylaxis and prevention of diphtheria. • Diphtheria is caused by the bacterium Corynebacterium diphtheriae. This germ produces a toxin that can harm or destroy human body tissues and organs. • One type of diphtheria affects the throat and sometimes the tonsils. Another type, more common in the tropics, causes ulcers on the skin. • Diphtheria affects people of all ages, but most often it strikes unimmunized children. • It is transmitted from person to person through close physical and respiratory contact. • DOC for Diphtheria infection: Erythromycin