Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series
__ SRDAT__ DA_SR __TS_D
The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair.
General Awareness
Which type of liverworts form umbrella-shaped structures that raise gametangia above the main gametophyte body and sporophytes develop below these structures?