In each of the following letters series, some of the letters are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
aa _ _ aba _ bca _ aab _ a _

The US reaffirmed its determination to sell Harpoon air-launched anti-ship missiles and Mark 54 lightweight torpedoes worth $155 million to which of the following country?

Indian shuttler PV Sindhu lost to which player to settle for silver in 2021 Swiss Open women's singles final?

Recently which freedom fighter died who won the National Communal Harmony Award?

A man travel from A to B at 20 km/Hr. and come back from B to A at 30 km/hr. Find the average speed of the whole journey.

Which of the following numbers will replace the question mark (?) in the given series?
 8, 16,13, ?, 47, 282

In the following question, a sentence has been given in Active/Passive voice. Out of four alternatives suggested, select the one, which best expresses the same sentence in Passive/Active.

The event manager is making all the reservations.

Seven persons are sitting around a circular dining table facing the towards the centre. S is sitting to the immediate left of Y and third to the right of R. R is sitting to the immediate left of A and immediate right of P. A is sitting to the immediate left of D. Q is sitting to the immediate left of P. If D exchanges seat with Y and P with Q, then who is sitting to the immediate right of D?