Question

a charge q us placed at the centre of the line joining two exactly equal positive charges Q. the system of three charges will be in equilibrium, if q is equal to
a)-Q
b)Q/2
c) -Q/4
d) +Q

Answer 1

according to me this is the answer
please correct me if it is wrong
and comment if correct

Answer 2

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Red blood cells do not have a nucleus on maturity. WBCs are characterized by the presence of a large central nucleus. Due to the presence of haemoglobin, these cells appear red in colour. These cells are colourless, as they do not have any pigment.