Periodic Table And Periodicity

How many of the following statements are correct?

(A) ' $\mathrm{He}^{\prime}$ ' is the second most abundant element in the universe.

(B) The symbol for the element with atomic number 110 is Ds.

(C) Osmium has the highest density among all elements.

(D) Francium is the most electropositive element in the periodic table.