Genital herpes is a non-curable STP even if detected earlier. Name two other non-curable STDs.

Assertion: CO_2 is non polar, while ROR is polar in nature. Reason: The dipole moments of two CO bonds are equal and opposite to each other in CO_2 , while in R-O-R molecules two dipoles of the R-O bonds are inclined to each other at an angle of 110°.

If a,b, and c are three non-zero vectors such that each one of them being perpendicular to the sum of the other two vectors, then the velus of |a +b+ c| ^(2) is