what is the strike price to use from the second table (dated 15/5/2020)

MSFT (MICROSOFT CORPORATION) May 02, 2020 @ 19:49 ET (Delayed) BID 174.2 ASK 174.86 VOL 19,152,995 LAST 174.5 CHANGE -4.64 (-2.66%) Filters by: Volume: All Expiration Type: All Options Range: Near the Money Expiration: 2020 May View Chain Options Chain Total Records: 16 Calls Last Net 6.18 -3.095 4.65 -2.625 3.24 -2.235 2.15 -1.775 Bid Ask 6.1 6.7 4.5 4.8 3.1 3.5 2.05 2.21 Vol 3.473 720 7.810 13,660 IV 0.4079 0.3896 0.3873 0.3728 Delta 0.7065 0.608 0.4944 0.3772 Gamma 0.0377 0.044 0.046 0.0455 Int 1389 1364 3852 3642 05/08/2020 Strike MSFT 170.000 MSFT 172.500 MSFT 175.000 MSFT 177.500 Puts Last Net 1.58 +0.6 2.5 +1.01 3.5 +1.295 4.92 +1.745 Bid 1.5 2.25 3.45 3.55 Ask Vol 1.72 6,340 2.65 4,415 3.7 5,972 5.5 2,948 IV Delta 0.3914 -0.2864 0.3852 -0.391 0.3804 -0.506 0.3204 -0.6448 Gamma Int 0.03883345 0.04451345 0.0468 4165 0.0519 1874 05/15/2020 Strike MSFT 170.000 Calls Last Net 7.6 -2.65 6.11 -2.24 4.65 -2 3.5 -1.65 Bid Ask 7. 4 9.2 3.95 8.2 4.5 5.1 3.25 4.3 Vol 1,081 494 2.934 2,939 IV Delta 0.4365 0.6442 0.3761 0.5837 0.3772 0.5035 0.38210.4258 Gamma 0.0259 0.0315 0.0321 0.0311 Int 33286 3701 17105 3880 Puts Last Net 2.82 +0.89 3.1 +0.525 5 +1.625 6.55 +2.175 Bid Ask 2.2 3.2 2 4.2 4.2 5.35 6 6.75 MSFT 172.500 Vol 3,586 1.380 3,074 1,105 IV 0.3596 0.3131 0.3498 0.364 Delta -0.3326 -0.4049 -0.4984 -0.5792 Gamma 0.0306 0.0375 0.0346 0.0326 Int 22934 23645 MSFT 175.000 MSFT 177.500 8269 2565