If A=[[ a b; 0 a ]] is nth root of I_2, then choose the correct statements: (i) if n is odd, a=1,...

If A=[[ a b; 0 a ]] is nth root of I_2, then choose the correct statements: (i) if n is odd, a=1, b=0 (ii) if n is odd, a=-1, b=0 (iii) if n is even, a=1, b=0 (iv) if n is even, a=-1, b=0 (1) i, ii, iii (2) ii, iii, iv (3) i, ii, iii, iv (4) i, iii, iv 📲PW App Link - https://bit.ly/PW_APP 🌐PW Website - https://bit.ly/PW_APP 📌 PHYSICS WALLAH OTHER CHANNELS : 🌐 PhysicsWallah -Alakh Pandey:    / @physicswallah   🌐 Alakh Pandey:    / @alakhpandey1414   🌐 JEE Wallah:    / @jee_wallah   🌐 Competition Wallah:    / @competitionwallah   🌐 PW Foundation:    / physicswallahfoundation   🌐 NCERT Wallah :    / @ncertwallahclass12pw   🌐 Defence Wallah-NDA:    / @defencewallahpw   🌐 PhysicsWallah English:    / @englishpw   🌐 PW Vidyapeeth:    / @vidyapeethpw   🌐 Commerce Wallah by PW:    / @commercewallahpw   🌐 CA Wallah bt PW:    / @cawallahbypw   🌐 PW Sarkari Exam:    / @pwsarkariexams   🌐 PW - Hindi Medium:    / @physicswallahhindimedium   🌐 PW Bangla:    / @pwbangla   🌐 PW Maharashtra:    / @pwmaharashtra   🌐 PW Telugu:    / @pwtelugu   🌐 PW Kannada:    / @pwkannada   🌐 PW Gujarati:    / @pwgujarati   🌐 PW Facts:    / @pwfacts   🌐 PW Insiders:    / @physicswallahinsider   🌐 PW Little Champs:    / @pwlittlechamps   🌐 PW Pathshala:    / @vidyapeethtalks   🌐 Banking Wallah :    / @bankingwallah   🌐 SSC Wallah :    / @sscwallahpw   🌐 JEE Challengers by PW :    / @jeechallengersbypw   🌐 UPSC Wallah :    / @pwonlyiasupsc   🌐 UPSC Wallah हिन्दी :    / @pwonlyiashindimedium   🌐 GATE Wallah :    / @gatewallahbypw   🌐 GATE Wallah - EC,EE & CS :    / @gatewallah_cse_da   🌐 GATE Wallah - ME, CE & XE :    / @gatewallah_me_ce_xe_ch   🌐 GATE English :    / @gatewallahenglish   🌐 College Wallah :    / @collegewallahbypwskills   🌐 PW IIT JAM & CSIR NET :    / @pwiit-jam   🌐 MBA Wallah :    / @mbawallah   🌐 Teaching Wallah :    / @teachingwallahbypw   📌 PHYSICS WALLAH SOCIAL MEDIA PROFILES : 🌐 Telegram : https://t.me/pwjeewallah 🌐 Facebook :   / physicswallah   🌐 Instagram : https://www.instagram.com/pwjee_walla... 🌐 Twitter :   / physics__wallah   🌐 Linkedin :   / admin   📌 For any queries or complaints Visit : https://bit.ly/PW_Queries