Which of the following class of Vertebrates possess milk

What should come in place of the question mark (?) in the given series based on the English alphabetical order?

NRT, JNP, FJL, BFH, ?

Which of the following options can replace the question mark (?) and complete the given number series?

8, 6, 32, 18, 128, ?

Which of the following numbers will replace the question mark (?) in the given series?

549  482  439  372  329  262  219 ?

JT79 is related to DN71 in a certain way. In the same way, KU22 is related to EO14. To which of the following is LV71 related, following the same logic?

Select the option that represents the letters that, when placed from left to right in the following blanks, will complete the letter-series.

Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.