Question

Options po4 and and option 2 po4 and Fe
options 3 PO 4 and Co3
option 4) cl and OH
wrong question will be reported and correct question will be mark as brainlist
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Answer 1

Answer:

here is your answer mate...

po4

Explanation:

po4=valency is -3

Fe=valency is 2 and 3

PO 4 and Co3=valency is 4

cl and OH=valency is 0

plz plz plz mark me as brainliest plzz...