1276: A married couple adopted a male child. A few years later twin boys were born to them. The blood group of the couple is 'AB' positive and 'O' negative. The blood group of the three sons is A positive, B positive, and 'O' positive. The blood group of the adopted son is
(a) A positive
(b) B positive
(c) O positive
(d) Cannot be determined
1277: Which one of the following polymers is widely used for making bullet proof material ?
(a) Polyvinyl chloride
(b) Polyamides
(c) Polyethylene
(d) Polycarbonates
1278: Which one of the following rivers thrice forks into two streams and reunites a few miles farther on, thus forming the islands of Srirangappattanam, Sivasamudram and Srirangam ?
(a) Cauvery
(b) Tungabhadra
(c) Krishna
(d) Godavari
1279: Which one of the following important trade centres of ancient India was on the trade route connecting Kalyana with Vengi ?
(a) Tagara
(b) Sripura
(c) Tripuri
(d) Tamralipti
1280: Match List I with List II and select the correct answer using the codes given below the Lists :
List I-------------------List II
I. German Silver---------(A) Tin
II. Solder----------------(B) Nickel
III. Bleaching Powder-----(C) Sodium
IV. Hypo-----------------(D) Chlorine
Codes:
(a) I-A, II-B, III-D, IV-C
(b) I-B, II-A, III-C, IV-D
(c) I-A, II-B, III-C, IV-D
(d) I-B, II-A, III-D, IV-C