Explanation:

Vertical and horizontal reservations

• There are two types of reservations, which are referred to as ‘vertical reservations’ and ‘horizontal reservations’. 
• The reservation in favour of scheduled castes, scheduled tribes and other backward classes [under Article 16(4)] may be called vertical reservation.
• It applies separately for each of the groups specified under the law.
• Horizontal reservation refers to the equal opportunity provided to other categories of beneficiaries such as women, veterans, the transgender community, and individuals with disabilities, cutting through the vertical categories.
• Special reservations in favour of physically handicapped, women, etc., under Articles 16(1) or 15(3) are “horizontal reservations”.
• Horizontal reservations cut across the vertical reservations – what is called interlocking reservations.
• Combined application of the two categories of quotas 
• The horizontal quota is applied separately to each vertical category, and not across the board. 
• For example, if women have 50% horizontal quota, then half of the selected candidates will necessarily have to be women in each vertical quota category. 
• It means half of all selected SC candidates will have to be women, half of the unreserved or general category will have to be women, and so on.

Hence both statements are correct.