Which of the following oxide/oxy-anions does not contain `P-O-P` linkage?

Which of the following oxoacid does not contain (S-O-S) linkage? (P) H_(2)S_(2)O_(6) (Q) H_(2)S_(2)O_(4) (R) H_(2)S_(2)O_(3)

Which of the following oxy acids does not contain peroxy bond

Which of the following oxy anion is metaborate ion ?

Which of the following oxy anion is metaborate ion ?

Which of the following oxyacid/oxysalt/compound does not contain peroxy linkage?

Which contains O-O linkage ?