Refer to the circuit diagram given in the figure. which of the following observations are correct?

A. Total resistance of circuit is $6 \Omega$

B. Current in Ammeter is 1 A

C. Potential across $A B$ is 4 Volts.

D. Potential across CD is 4 Volts

E. Total resistance of the circuit is $8 \Omega$.

Choose the correct answer from the options given below:

To obtain the given truth table, following logic gate should be placed at G :

Which of the following circuits represents a forward biased diode?

Choose the correct answer from the options given below:

In the truth table of the above circuit the value of X and Y are :