If the approximate average mean pressures during induction, compression, power and exhaust strokes of an internal combustion engine are respectively \[\text{15}\,\,\text{k}\,\text{N/}{{\text{m}}^{\text{2}}}\] below atmosphere 200\[k\,\text{N/m}\] above atmosphere, \[\text{1000}\,\,\text{k}\,\text{N/}{{\text{m}}^{\text{2}}}\] above atmosphere and \[20\,\,\text{N/}{{\text{m}}^{\text{2}}}\] above atmosphere, then the resultant mean effective pressure, in \[k\,\text{N/}{{\text{m}}^{\text{2}}},\] is:

• A. 765                              
• B. 795
• C. 800                              
• D. 805