In case of the parallel adder, the speed with which an addition can be performed is governed by the time required for the carries to propagate or ripple through all the stages of the adder. Which of the following statements are correct?(A) The method of speeding up the addition process is based on additional functions of full adder called carry generate and carry propagation.(B) The look-ahead carry adder speeds up the process by eliminating ripple carry dely.(C) The final sum output of the nth stage is given by \({S_n} = {P_n} \oplus {C_n}\) where \({P_n} = {A_n} \oplus {B_n}\)(D) The final carry output of nth stage is given by Cn+1 = Gn + Pn where Gn = An ⋅ BnChoose the correct answer from the options given below:(1) (A) and (B) only(2) (A) and (C) only(3) (A), (B) and (C) only(4) (B), (C) and (D) only

• A. 1
• B. 2
• C. 3
• D. 4