Explanation:

• The B.1.617.1 and B.1.617.2 variants of COVID-19, first identified in India, have been named as ‘Kappa’ and ‘Delta’ respectively, the World Health Organisation (WHO) announced on 1st June as it named various variants of the coronavirus using Greek alphabets.
• The UN health agency named the B.1.617.1 variant of the COVID-19 as ‘Kappa’ while the B1.617.2 variant was dubbed ‘Delta’. Both the variants were first found in India.