Alphanumeric/Symbol Series

R-ALNUM-2Q.1

What should come in place of question mark (?) in the following series based on the above arrangement? ZB XD UG QK ?

1. (a) LK
2. (b) LO
3. (c) LP
4. (d) KP
5. (e) Other than the given options

Note: The series line "ZB XD UG QK ?" is printed as an image in the source PDF (not in its text layer); transcribed from the page image. Question refers to an "above arrangement" that is not given in source. The 2020 Adda247 re-issue prints the first term as "ZN".

R-ALNUM-3Q.2

How many such pair of numbers are there in the given number “46579739” (Both backward and forward) same as far as according to numeric series?

1. (a) One
2. (b) Two
3. (c) Three
4. (d) More than three
5. (e) None of these.