Find the sum of 4 terms of the geometric series - 21, 42, 84,

A+B का अर्थ है कि A, B का पिता है।

A-B का अर्थ है कि A, B का भाई है।

कथनः

A. कुछ हाथी, व्हेल हैं।

Study the given pattern carefully and select the number that can replace the question mark (?) from the given alternatives. 

Select the number from the options which will come in place of the question mark (?) in the following pattern. 

Answer the question given below on the basis of the given number and symbol series. 

(Left) 3% $ 7 2 5 $ 1 & 6 # * 3 9 ! 4 3 @ S 8 (right) 

From the given options, select the alphanumeric group which will come in place of the question mark (?) in the following series.