NEET Biology question

Select the correct statements regarding the characteristics of acquired immunity. 1. Cell-mediated immunity is responsible for acquired immunity 2. It produces a primary response of low intensity 3. Active and passive immunity are types of acquired immunity 4. Polymorphonuclear leucocytes and natural killer cells are involved in acquired immunity

• (A)(i), (ii) and (iii)Correct
• (B)(i), (iii) and (iv)
• (C)(i) and (iv)
• (D)(i) and (iii) only