Consider an oxyacid with the formula HXO₄. How does the acidity change with increasing electronegativity of X?

Identify the following statements as correct or incorrect. In case a statement is incorrect, correct the statement.

A) HCl is a stronger acid than HBr because of the higher electronegativity of the chlorine atom.

B) The strength of binary acids increases from top to down in a group.

C) The strength of oxyacids decreases with the number of oxygen atoms around the central atom.

Rank the following oxyacids in order of increasing acidity: 

H₂SO₄, H₂SeO₄, H₂TeO₄

Classify HClO₄ as either weak or strong acid. If it is weak, write the K_a expression.